66 results about "Hydrogen safety" patented technology

The invention relates to the technical field of automobile energy supply, in particular to a solid hydrogen storage-fuel cell integrated power assembly system based on dual-mode hydrogen supply, which comprises a hydrogen supply path identification module, a hydrogen storage unit state monitoring module, a linkage path switching module, a fuel cell load matching module and a safe hydrogen discharge regulation and control module. According to the method, the hydrogen supply pressure difference value is obtained by dynamically comparing the pressure of the cavity of the hydrogen storage tank with the pressure of the hydrogen inlet of the fuel cell, the current hydrogen supply path state can be accurately recognized in the early stage, rapid judgment of the hydrogen supply mode and accurate control of path switching are achieved, whether the risk of hydrogen supply interruption exists or not can be effectively screened, and the reliability of hydrogen supply is improved. The switching reliability of a hydrogen supply channel is improved through cross comparison of key state signals of a main channel and a standby channel, and instant response and energy consumption optimization of hydrogen discharge safety regulation and control are guaranteed through a linkage feedback mechanism between the hydrogen concentration change rate in unit time and catalytic converter control power.

The invention discloses an electricity-hydrogen-ammonia coupling system configuration method and system, and relates to the technical field of electricity-hydrogen-ammonia coupling systems, and the method comprises the steps: sequentially carrying out two-stage clustering according to renewable energy source daily output data, electrothermal hydrogen daily load data and daily net energy, and generating a typical daily scene and a clustering index; performing electric hydrogen ammonia energy storage collaborative simulation operation on all the typical day scenes, and reconstructing a year-round energy storage state based on a clustering index according to the variation of the hydrogen storage amount and the ammonia storage amount after simulation operation of each typical day scene; and taking the minimum annual total cost formed by the simulation operation cost, the capacity configuration cost and the hydrogen safety risk cost as an optimization target to obtain an optimal equipment capacity configuration scheme. While the calculation cost is reduced and the solving efficiency is improved, the time sequence connection characteristic and the energy storage characteristic of different long-time energy storage are kept, and multi-time-scale energy transfer is realized, so that the applicability and the economical efficiency of a planning scheme are improved.

The invention discloses a hydrogenation safety control method and system based on adaptive robust filtering, and relates to the technical field of hydrogen energy, and the method comprises the steps: building a state prediction equation of a plurality of sensors in a hydrogenation process of a hydrogen refueling station based on Kalman filtering; constructing a filtering residual error based on the state prediction equation, and constructing a robust factor based on the filtering residual error; adjusting the initial observation noise covariance matrix of each sensor based on the robust factor to obtain an observation noise covariance matrix after robust adjustment; based on the health degree of each sensor, calculating a weight value corresponding to each sensor; dynamically adjusting the observation noise covariance matrix after the adversarial adjustment based on the weight value to obtain an observation noise covariance matrix after the weight adjustment; and based on the observation noise covariance matrix after weight adjustment and the state prediction equation, performing filtering updating on the state parameters of the plurality of sensors. The technical problem that in the prior art, the control precision and safety of a hydrogen refueling station are insufficient is solved.

The invention relates to the technical field of new energy hydrogen production and chemical coupling application, and discloses a natural gas hydrogen-doped pipeline conveying system which comprises an energy supply layer, a chemical production layer, a digital integrated platform and a dispatching control module. The energy supply layer integrates photovoltaic power, wind power, nuclear power and a power grid standby power supply through a direct-current micro-grid, is matched with a sodium ion flow battery energy storage system, and supplies energy to the water electrolysis hydrogen production system of the non-noble metal catalyst and porous electrode structure. In the chemical production layer, pipeline steel or double-layer alloy steel is selected as a hydrogen-doped pipeline according to the proportion, a hydrogen concentration monitoring and sound wave leakage detection system is arranged, the hydrogen-doped safety upper limit of high pressure of 10% and low pressure of 30% is set, and a chemical hydrogen using system is connected through a gas distribution valve set and adjusted by an intelligent module. The digital platform is based on monitoring of the Internet of Things, hydrogen doping is optimized by means of a fuzzy PID algorithm and digital twinning, and risks are early warned. The scheduling module combines wind and light prediction and real-time electricity price, optimizes the start and stop of the electrolytic cell, the hydrogen doping ratio and the conveying pressure, and achieves efficient and stable conveying.

The application belongs to the technical field of hydrogen safety monitoring, and specifically relates to a hydrogen leakage detection and positioning system.The system comprises a hydrogen leakage far-field detection unit array, a data platform and a hydrogen leakage on-site attached detection unit.The far-field detection unit array is composed of multiple wireless hydrogen sensors and a leakage hydrogen collection device, is used for remotely and timely detecting the hydrogen concentration of a hydrogen system to be detected, and sends the detected hydrogen concentration and the corresponding detection unit number to the data platform;the data platform determines the hydrogen leakage position accordingly;the hydrogen leakage on-site attached detection unit is arranged in the detection range of each far-field detection unit, is attached to a key position with a relatively high leakage probability in the hydrogen system to be detected, and realizes visual detection of hydrogen leakage;the system can improve the safety, accuracy and cost-effectiveness of hydrogen leakage monitoring, and is suitable for various application scenarios such as hydrogen refueling stations and hydrogen energy production and storage sites.

The present invention provides an apparatus for evaluating a safety valve for liquid hydrogen, the apparatus including: a hydrogen liquefaction unit configured to liquefy hydrogen gas and store the liquid hydrogen in a liquid hydrogen storage chamber; and a hydrogen vaporization unit configured to vaporize the liquid hydrogen stored in the liquid hydrogen storage chamber. By delivering high-pressure cryogenic vaporized hydrogen, which is generated by accumulation of vaporized hydrogen filling an internal space of the liquid hydrogen storage chamber, to a liquid hydrogen safety valve for a test, performance of the safety valve for liquid hydrogen can be evaluated under actual operating environmental conditions. Accordingly, reliability of performance evaluation data for the safety valve for liquid hydrogen can be ensured.

The invention discloses an energy-saving intelligent purging method in a galvanic pile shell, relates to the technical field of fuel cells, and introduces an intelligent purging strategy to ensure dew point control and hydrogen safety in the galvanic pile shell at the same time, so that waste of compressed air is avoided, and energy is saved. It is guaranteed that condensation is not generated in the galvanic pile shell (the purging amount is intelligently calculated), the combustible gas explosion risk is avoided (the purging amount is intelligently calculated), and meanwhile cold start of the galvanic pile can be facilitated (galvanic pile cooling caused by excessive purging is avoided).

This invention provides a BCC solid-state hydrogen storage safety control system, comprising: a hydrogen storage device having a hydrogen storage tube with a built-in BCC hydrogen storage alloy, a hydrogen charging valve for controlling the opening and closing of the hydrogen storage tube, and a coolant channel; a cooling system forming a closed-loop circulation loop with the coolant channel for supplying coolant to the hydrogen storage device; and a safety interlock control module for collecting safety-related parameters of the hydrogen storage device, cooling system, and environment. When the parameters meet the first-level, second-level, and third-level interlock conditions, the module correspondingly activates the first-level interlock to open the hydrogen charging valve, the second-level interlock to adjust the hydrogen flow rate and the operating parameters of the cooling system, and the third-level interlock to close the hydrogen charging valve. The BCC solid-state hydrogen storage safety control system of this invention features high integration, good safety, and high intelligence. Through an optimized heat exchange structure, rigorous multi-level interlock logic, and a comprehensive fault diagnosis model, the system achieves efficient thermal management, full-process safety protection, and intelligent fault handling during the hydrogen charging process.

This application discloses a multi-scenario test system for hydrogen safety in tunnels, comprising: a simulated tunnel component, which includes a tunnel pipe and an axial flow fan disposed at one end of the tunnel pipe. The axial flow fan faces the tunnel pipe and is used to purge the tunnel pipe and provide different ventilation velocities within the tunnel pipe. Sensor holes are provided on the side wall of the tunnel pipe for connecting external sensors as needed. An installation base is provided at the bottom of the tunnel pipe. A mounting bracket is provided, which includes a base plate and a top plate, which are supported by a support plate. The base plate is mounted on the installation base. A hydrogen storage component is provided, which includes a hydrogen storage tank, a mounting plate, and a mounting clamp. The mounting clamp fixes the hydrogen storage tank to the mounting plate. The axial direction of the hydrogen storage tank is parallel to the mounting plate. The mounting plate is mounted on the top plate, and the angle between the mounting plate and the top plate is 0°–90°.

This invention discloses a method, system, electronic device, and storage medium for measuring hydrogen leakage rate, relating to the field of hydrogen safety utilization technology. The method includes: calculating the acoustic signal and signal phase difference corresponding to the target device based on an ultrasonic sensor array; obtaining a predicted nozzle aperture based on the acoustic signal, signal phase difference, and a first conversion model determined by a deep learning algorithm; obtaining a predicted gas pressure based on the acoustic signal, signal phase difference, and a second conversion model determined by a deep learning algorithm; and calculating the hydrogen leakage rate at the leak point of the target device based on the predicted nozzle aperture and gas pressure. This invention can accurately predict the hydrogen leakage rate, thus laying the foundation for predicting the amount of hydrogen leakage and the timing of early warnings.

A hydrogen explosion suppression system and method based on multi-dimensional perception and hierarchical linkage belong to the technical field of hydrogen safety protection. The system comprises a control unit, a hydrogen concentration sensor, a spark sensor, a flame sensor, a pressure sensor, a control unit and an explosion suppression action mechanism. The control unit receives alarm signals from each sensor and controls the corresponding explosion suppression action mechanism according to the preset hierarchical linkage rules, realizing hierarchical identification and linkage explosion suppression based on multi-dimensional signals such as hydrogen concentration, spark, flame and pressure, and solving the technical problems of single hazard identification dimension, fixed explosion suppression response mode and difficult to balance response speed and explosion suppression effect in related technologies.

The invention relates to a hydrogen-rock microfluidic in-situ test system and method for simulating underground hydrogen storage. The system comprises an environment control module, a reaction type microfluidic chip, a fluid injection module, a back pressure control module, an in-situ test module and a gas chromatographic analysis module, the environment control module provides a high-temperature and high-pressure environment; the reaction type micro-fluidic chip is arranged in the environment control module and provides a hydrogen-rock reaction place; the inlet end of the reaction type micro-fluidic chip is connected with the fluid injection module, and the outlet end of the reaction type micro-fluidic chip is sequentially connected with the back pressure control module and the gas chromatographic analysis module; the back pressure control module is used for maintaining a preset pressure environment; the in-situ test module is used for capturing fluid distribution and mineral form change in the chip; and the gas chromatographic analysis module is used for analyzing the composition and concentration change of a reaction outlet gas-phase product. According to the device and the method, the micromorphological evolution and the macroscopic reaction rate of the hydrogen-rock reaction in the underground reservoir environment are synchronously monitored, and an accurate experimental means is provided for geological hydrogen storage safety evaluation.

The utility model discloses a hydrogen leakage disposal system for an airplane, which belongs to the technical field of airplane hydrogen safety and comprises a hydrogen leakage detection unit, a signal processing unit, a control unit, a passive ventilation unit and an inert gas control unit. The hydrogen leakage detection unit and the passive ventilation unit are arranged on a cabin wall plate right above a hydrogen leakage danger area; the inert gas control unit is arranged right below the hydrogen leakage danger area; the hydrogen leakage detection unit is connected with the signal processing unit, the signal processing unit is connected with the control unit, and the control unit is connected with the inert gas control unit and the passive ventilation unit; according to the system, the mode that the cabin space is filled with inert gas replaces the mode that a traditional fire extinguisher extinguishes fire points, the system is suitable for the situation that the hydrogen leakage position in a large space is unknown, the detection, alarm and disposal functions can be achieved in the flight process and the ground operation process of an aircraft, and the safety of hydrogen use of the aircraft can be remarkably improved.

The utility model relates to the field of protection devices, in particular to a solid hydrogen storage safety protection device. Comprising a solid hydrogen storage device, a controller and a protection assembly, the solid hydrogen storage device comprises a shell and a hydrogen storage tank, the hydrogen storage tank is installed in the shell, the protection assembly comprises a protection box and a bottom plate, the controller is installed on one side of the outer wall of the protection box, the bottom plate is attached to the inner wall of the protection box, and the shell is placed on the upper surface of the bottom plate; two mounting plates are fixedly connected to the lower surface of the bottom plate, and fixing plates are fixedly connected to the two sides of the outer wall of the protection box. The solid-state hydrogen storage safety protection device has the advantages that in the daily use process of the solid-state hydrogen storage device, the protection box can isolate external air from the solid-state hydrogen storage device, so that danger caused by hydrogen leakage is prevented, air leaked from the interior of the protection box can be automatically poured into the tank body to be stored, and the safety of the solid-state hydrogen storage device is improved. And the use safety of the solid hydrogen storage device is improved.

The invention discloses a high-pressure hydrogen-doped natural gas pipeline leakage ignition experiment device and an experiment method, and belongs to the technical field of high-pressure hydrogen safety experiments. The high-pressure hydrogen-doped natural gas pipeline leakage ignition experiment device comprises a hydrogen pressurization system which is connected with a high-pressure gas storage tank through a confluence pipeline; a vacuumizing assembly, an emptying ball valve and an electric control valve are arranged on a confluence pipeline between the hydrogen pressurizing system and the high-pressure gas storage tank, and the electric control valve is in communication connection with an external computer; a rupture disk clamping structure is arranged at one end of the high-pressure gas storage tank, and a rupture disk is arranged on the rupture disk clamping structure; one end of the high-pressure gas storage tank provided with the rupture disk is provided with an ignition system, a camera shooting assembly and an out-of-tube thermocouple array, a lifting structure is arranged at the bottom of the ignition system, and a plurality of sliding grooves are formed in the bottom of the lifting structure. According to the device, ignition parameters can be accurately controlled, dynamic pressure adjustment of the high-pressure storage tank is achieved, and the defects of an existing experimental device in the aspects of ignition control, pressure simulation and scene adaptability are overcome in combination with multi-dimensional ignition positioning.

The invention discloses a hydrogen supply system control method and system of a hydrogen fuel cell vehicle, the vehicle and equipment. The hydrogen supply system control method of the hydrogen fuel cell vehicle comprises the following steps: receiving a hydrogen replacement request of a hydrogen supply system gas storage cylinder; if the electric quantity of the vehicle power battery meets the replacement condition, judging whether an obstacle influencing filling work exists in the hydrogenation equipment calibration area or not according to the environment image; if not, controlling the vehicle to park in the area, and detecting whether the hydrogen supply system reaches a safety index or not; if yes, the vehicle is controlled to enter a hydrogen system standby state, and whether the whole vehicle state meets the hydrogen adding condition or not is detected; if yes, hydrogen filling operation is carried out, and in the filling process, whether the hydrogenation state is abnormal or not is judged; and if not, continuing the hydrogenation operation until the hydrogenation completion condition is met, otherwise, interrupting the filling process and giving an alarm prompt. By adopting the application, automatic monitoring and safety judgment can be performed on the whole hydrogenation process, so that the hydrogenation safety is ensured, and the control efficiency of the hydrogen supply system is improved.

The application discloses a vehicle-mounted mobile methanol autothermal reforming hydrogen production system and a hydrogen production method. The system comprises a methanol storage tank and a desalted water storage tank, both of which are communicated with a mixed liquid tank, and the mixed liquid tank is sequentially communicated with a gasifier, a premixer, a hydrogen production reactor, a condensation heat exchange unit and a hydrogen purification unit. An air preheating unit is communicated with the premixer and delivers hot air to the premixer. Methanol and desalted water are mixed in the mixed liquid tank, methanol water solution is heated to form a methanol water vapor mixture in the gasifier, hot air is mixed with the methanol water vapor in the premixer, and a methanol autothermal reforming reaction occurs in the hydrogen production reactor. The reaction product is input into the condensation heat exchange unit and the hydrogen purification unit for treatment. The application has the advantages of compact structure, simple operation, good stability and the integration of hydrogen production, storage and utilization, and solves the problems of large hydrogen production system area, high hydrogen transportation safety risk and high hydrogen use cost in the prior art.

The invention belongs to the technical field of blast furnace ironmaking, and discloses a blowing-out process and a safety control method of a hydrogen-rich carbon circulating oxygen blast furnace. According to the method, safe and controllable furnace shutdown is achieved through systematic processes of preparation before furnace shutdown, precise load design, dynamic medium regulation and control, furnace top temperature and water fetching control, hydrogen safety monitoring and multi-dimensional end point judgment. The furnace condition is adjusted and the furnace is thermally washed before blowing out, the comprehensive ore-coke ratio load of 3.0-3.4 is designed based on the basic furnace temperature, the furnace top temperature is strictly controlled to be smaller than or equal to 350 DEG C in the process, the nitrogen flow is cut in advance, the nitrogen flow is increased in a stepped mode, the gas cutting operation is triggered with the hydrogen content being 12% as the threshold value, and the blowing-out end point is determined by combining a radar stock rod, wind pressure monitoring and manual tuyere exploration. According to the method, the hydrogen explosion risk is effectively prevented and controlled, the thermal state is accurately controlled, and the method is suitable for HyCROF and similar low-carbon blast furnaces through industrial verification and has extremely high safety, reliability and popularization value.

The utility model relates to an anti-collision damping device between hydrogen conveying pipelines, which comprises an arc-shaped plate, a sliding seat is connected to the front side of the arc-shaped plate in a sliding manner, extension components are connected between the left part and the right part of the sliding seat and the arc-shaped plate, a buffer component is mounted on the sliding seat, and locking pieces are mounted on the upper part and the lower part of the arc-shaped plate. Springs are connected between the locking pieces and the arc-shaped plates, damping pieces are connected to the upper portions and the lower portions of the sliding seats, heat dissipation assemblies are installed on the rear portions of the arc-shaped plates, and air blowing assemblies are installed on the upper sides of the arc-shaped plates. The buffer assembly is arranged, when the hydrogen conveying pipeline is impacted by external force, the piston piece moves backwards to exhaust air in the cylinder body, so that the impact of the external force on the hydrogen conveying pipeline is relieved, meanwhile, the damping piece makes contact with the arc-shaped plate and is compressed under stress, and secondary vibration reduction treatment is conducted on the hydrogen conveying pipeline; the heat dissipation assembly conducts heat on the surface of the hydrogen conveying pipeline and dissipates heat, the air blowing assembly conducts cold blowing treatment on the heat dissipation assembly, then the temperature of the surface of the hydrogen conveying pipeline is reduced, and therefore hydrogen conveying safety is guaranteed.

This invention relates to the field of damage testing platforms, specifically disclosing a hydrogen-temperature-load synchronous damage testing platform, comprising a hydraulic rod, a support platform, a hydrogen tank, a heating sleeve, and a test cylinder. The test cylinder is mounted on the support platform, and the hydrogen tank is mounted on one side of the support platform via a clamp. The heating sleeve is located on the outer side of the test cylinder. A top cover is provided on the top of the test cylinder, and a punch rod is located inside the top cover. The top end of the punch rod is connected to the telescopic end of the hydraulic rod. A hydrogen supply cylinder is located at the bottom of the test cylinder, and an inlet pipe and a pressure detection pipe are respectively located on both sides of the hydrogen supply cylinder. A pressure gauge is mounted on the pressure detection pipe. This invention's small punch rod method only requires the preparation of small circular samples and can be carried out in special environments such as high and low temperatures. Due to the small size of the device, the required hydrogen loading is small, improving hydrogen safety. The top cover of the test cylinder is assembled with the test cylinder by a pin.

The present invention discloses a pressure-type hydrogen safety nozzle, comprising a valve body, a cavity disposed within the valve body, an output nozzle fixedly connected to one side of the valve body, the output nozzle communicating with the cavity, an input nozzle fixedly connected to the valve body, the input nozzle communicating with the cavity, a channel for hydrogen to pass through the input nozzle, the cavity, and the output nozzle, a blocking bladder disposed within the cavity for blocking the channel, a tube connected to the blocking bladder passing through the side of the valve body remote from the output nozzle, and a liquid or gas disposed within the blocking bladder. During the opening and closing process of the present invention, the valve body and the output nozzle are kept away from a power source, thereby preventing sparks from the output nozzle and ensuring safer hydrogen output.

The invention discloses a multi-hydrogen-supply-system fuel cell forklift which comprises a forklift body with a battery bin and further comprises an upper hydrogen supply system and a lower hydrogen supply system, the upper hydrogen supply system is arranged on a balance weight of the forklift body, and the lower hydrogen supply system is arranged in the battery bin of the forklift body. The invention further discloses a hydrogen safety control method of the fuel cell forklift with the multiple hydrogen supply systems. The upper hydrogen supply system and the lower hydrogen supply system form a double hydrogen supply system, double endurance is provided for the fuel cell forklift, and the longer operation requirement is met. By means of the hydrogen emergency discharge pipe, the upper hydrogen concentration sensor, the lower hydrogen concentration sensor and other devices, the hydrogen leakage hidden danger can be found in time, the risk of hydrogen explosion is effectively prevented, and the double-hydrogen-supply system can be assisted to operate more safely.

The present application relates to the technical field of automobile energy supply, in particular to a solid-state hydrogen storage-fuel cell integrated powertrain system based on dual-mode hydrogen supply, which comprises a hydrogen supply path identification module, a hydrogen storage unit state monitoring module, a linkage path switching module, a fuel cell load matching module and a safety hydrogen discharge control module. In the present application, the hydrogen supply pressure difference is obtained by dynamically comparing the pressure of the hydrogen storage tank cavity and the hydrogen inlet pressure of the fuel cell, which can accurately identify the current hydrogen supply path state in the early stage, realize the rapid determination of the hydrogen supply mode and the precise control of the path switching, effectively screen whether there is a hydrogen supply interruption risk, use the cross comparison of the key state signals of the main channel and the standby channel to improve the reliability of the hydrogen supply path switching, and through the linkage feedback mechanism between the hydrogen concentration unit time change rate and the catalytic converter control power, the instant response and energy consumption optimization of the hydrogen discharge safety control are ensured.

The application relates to the technical field of hydrogen production by electrolysis of water, and discloses a hydrogen safety control method and device for an alkaline water electrolysis hydrogen production system, which comprises the following steps: constructing an alkaline water electrolysis hydrogen production system voltage model; obtaining hydrogen cross-diffusion data caused by hydrogen diffusion through a diaphragm and hydrogen circulation cross data in an alkali liquor circulation loop, constructing an alkaline electrolytic tank oxygen hydrogen concentration model based on the hydrogen cross-diffusion data and the hydrogen circulation cross data; determining oxygen hydrogen concentration real-time data based on the alkaline water electrolysis hydrogen production system voltage model and the alkaline electrolytic tank oxygen hydrogen concentration model; obtaining oxygen hydrogen concentration monitoring data through a hydrogen sensitivity monitor, and performing hydrogen safety control on the alkaline water electrolysis hydrogen production system based on the oxygen hydrogen concentration real-time data and the oxygen hydrogen concentration monitoring data. The application improves the calculation accuracy of the oxygen hydrogen concentration, realizes double control of the hydrogen safety of the alkaline water electrolysis hydrogen production system, and guarantees the hydrogen safety of the alkaline water electrolysis hydrogen production system.

The invention discloses a hydrogen safety management structure of a hydrogen engine crankcase. The hydrogen safety management structure comprises a gas inlet pipe, a gas supplementing header pipe, a control valve, a cylinder body, a plurality of sensors and at least two branch pipes. Wherein the air inlet pipe is connected with an air source; one end of the air supply header pipe is communicated with the air inlet pipe, and the other end of the air supply header pipe is connected with the branch pipe; the branch pipe is communicated with the air cylinder body through an air supplementing connector so that air can be supplemented to a crankcase. The sensor is arranged in the cylinder body and is used for detecting the concentration of hydrogen in the crankcase; the control valve is arranged between the air supply main pipe and the branch pipe so as to adjust the amount of air entering the crankcase. Aiming at the hydrogen leakage safety pain point of the hydrogen engine crankcase, an integrated management and control structure of directional gas supply and accurate detection is constructed, and the problem that a traditional engine does not have special crankcase hydrogen concentration management and control hardware is solved.

The present invention relates to a method and system for the integrated active and passive protection of hydrogen safety in confined spaces. The specific protection method is as follows: establishing a proportional test model and a simulation model of a confined space hydrogen utilization system, and conducting numerical simulation analysis; carrying out identification of hazardous sources in confined spaces, determining the installation positions of confined space hydrogen leakage collection devices and hydrogen concentration sensors, and formulating hydrogen micro-leakage criteria based on the hydrogen concentration change rate, hydrogen concentration mutation amount, and hydrogen concentration threshold; determining the layout of the confined space exhaust system and explosion pressure relief system. The protection system includes active protection devices and passive protection devices. Compared with the prior art, the present invention verifies the accuracy of the simulation model, continuously optimizes and adjusts the simulation model until the accuracy meets the requirements, and the results obtained are more reliable and more consistent with the actual situation. The integrated active and passive protection device for hydrogen safety proposed by the present invention has both early warning and protection functions, and comprehensively and efficiently realizes the prevention and control of system hydrogen safety.

The invention discloses a hydrogen energy unmanned aerial vehicle hydrogenation safety protection system and a hydrogen energy unmanned aerial vehicle hydrogenation station, and relates to the technical field of hydrogenation unmanned aerial vehicles. The hydrogen energy unmanned aerial vehicle hydrogenation safety protection system comprises an unmanned aerial vehicle landing pad, a double-gun double-metering hydrogenation machine and a spraying cooling device. The double-gun double-metering hydrogenation machine is arranged on one side of the unmanned aerial vehicle take-off and landing platform and is used for carrying out hydrogenation operation on the hydrogen energy unmanned aerial vehicle when the hydrogen energy unmanned aerial vehicle lands on the unmanned aerial vehicle take-off and landing platform; the spraying cooling device is arranged on one side of the unmanned aerial vehicle takeoff and landing pad, and a spraying opening of the spraying cooling device faces the unmanned aerial vehicle takeoff and landing pad and is higher than the plane where the unmanned aerial vehicle takeoff and landing pad is located; the spraying cooling device is used for being controlled to spray a liquid cooling medium to the unmanned aerial vehicle takeoff and landing platform. According to the technical scheme disclosed by the invention, the safety of the hydrogen energy unmanned aerial vehicle during hydrogenation operation can be improved.

This invention discloses a hydrogen leakage ventilation system and method for hydrogen-powered aircraft, relating to the field of hydrogen safety in hydrogen-powered aircraft. The system's liquid hydrogen pipeline is sequentially connected to a liquid hydrogen Dewar flask, a third cryogenic shut-off valve, a liquid hydrogen primary heat exchanger, a first cryogenic shut-off valve, a liquid hydrogen secondary heat exchanger, a third shut-off valve, and the engine; the coolant outflow pipeline is sequentially connected to the engine, a fourth shut-off valve, and the liquid hydrogen secondary heat exchanger; the coolant return pipeline is sequentially connected to the liquid hydrogen secondary heat exchanger, the first shut-off valve, and the engine; the engine exhaust pipeline is sequentially connected to the engine, a fifth shut-off valve, a liquid hydrogen primary heat exchanger, a second cryogenic shut-off valve, a dryer, and an exhaust gas buffer tank; a low-flow purging pipeline is sequentially connected to the exhaust gas buffer tank, a back pressure valve, and an vent; and a high-flow purging pipeline is sequentially connected to the buffer tank, the second shut-off valve, and the exhaust port. This invention has the functions of passively and actively venting oxygen-deficient exhaust gas, used for dilution purging in the absence of significant hydrogen leakage and in the event of significant hydrogen leakage, respectively.